Evaluación basada en SIG de la tectónica activa a partir de parámetros morfométricos e índices geomórficos de la cuenca del río Mayo al sur de Ecuador

Abstract

Abstract: The tectonic evaluation of the Mayo River basin south of Ecuador, using parameters morphometric and geomorphic indices for 225 third-order subbasins, in conjunction with tectonic structures recognized in the region, point out notable anomalies in the parts northern and western parts of the basin, associated with uplifts and changes in terrain caused by active faults, forming "V" river valleys. A large part of the third-order sub-basins are in a juvenile phase, which suggests a progressive erosion that could lead them to a state of maturity or peneplain in the future. The analysis of the ksn index and the distribution of knickpoints, related to failures such as Palanda, Sabanilla, Numbala and the Las Aradas fault system, indicate that the activity Tectonics is the main cause of the present anomalies. Furthermore, the Chi index reveals that The basin is in a process of river capture and a possible loss of water area. drainage in favor of these adjacent basins, highlighting a dynamic of competition geomorphological that could modify the hydrographic configuration of the region in the future.